Larry,
I have 609 cert and have had it since it was introduced. I have been working on auto a/c for a few years, maybe 37 years (yes I'm an old fart).
Steve says his shop has converted more than a thousand (or something like that) but now says DON'T convert. I wonder if he is going to call all those people and have them come back in so he can convert back to R-12 for free since it was the wrong thing to do? haha
I still say, you should never say NEVER when it comes to conversions.

By the way, thanks for the tip on buying R12 on ebay, but I never buy from a person unless I can see him or her in person. The exception is ordering something from a company I know and I called them, not them calling me. Read through some of the post about things people have bought on E-Bay and found out there are crooks everywhere. I know there is a lot of R-12 canisters out there that have propane or a mix in them. I have seen them. The canisters are original R-12 canisters which have been refilled. Yes this is unlawfull but so is robbing banks but it happens every day.

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84 500 SEL (307,xxx miles)